Metric wood screw dimensions explained

Metric wood screw sizes and why they beat imperial… The old imperial method of measuring screws by gauge makes little sense to some of us today, (like most imperial measurements) and the logic of their origins is known only to Wikipedia (he says smiling!). So, now we are getting to grips with the common sense of metric wood screw measurements. (Arguments against on a postcard to the usual address please!).  Right, so what do the numbers mean? Lets take a look at the packaging to start with… The basic info …

pilot clearnace countersink aounterbore holes explained

Screws Explained:

Screw Gauge, Metric, Size, Clearance Holes, Pilot Holes & Wall Plugs I’ve explained this screw data in an easy to understand table because I find manufacturers recommendations are often vague and general, I mean; why not be specific? I understand there’s a ‘range’ but why not give us the ‘ideal’ measurement, because mostly we have a choice? The table below shows you: Metric equivalents to imperial gauge. What size pilot hole to drill in timber substrates for the best screw grip. What size clearance hole to drill through the timber being fixed. …